Dynaudio Confidence 5

I have just found a pair of the these speakers used and I would like to hear of your expirience with them.
I currently use a pair of Quad ESL-63, would the Confidence 5 be step up the ladder?
I have read about the Dynaudios and they seem to be a correctly designed speaker?
I have one reservation about the Confidence 5, which is the rather high bass cut of (43 hz -1,5 db), do they sound thin?
Would they intergrate well with 2 Vandersteen 2wq subs?
My room is about 200 square feet with about 9 feet to the ceiling.

Any comments would be very nice.

Thanks in advance

Ulrikgm